* restaurants from amazon
* home real estate market[0]
* shopping from amazon
* entertainment from amazon
* alexa from amazon, listening all the time
* education (already some basic form of it exists - alexa is used to answer kids questions)
Although many important key services are still missing: healthcare, insurances, banking.. etc.
edit: banking-related product already out [1]
[0] https://news.ycombinator.com/item?id=20152956
[1] Banking - Amazon.com Credit Builder - https://news.ycombinator.com/item?id=20149304